NOTE: Confirm that you can see hidden files and folders by clicking Start Control Panel Appearance and Personalizations Show hidden files and folders under Folder Options and select the Show hidden files and folders option.
Windows XP/2003:
1. Click Start Run and type:
C:\Documents and Settings\All Users\Application Data\ESET\ESET Remote Administrator\Server
\configuration
2. Click OK. Right-click the era_private.xml file and choose Open With Wordpad.
3. Remove the entire tag containing 'ps_password_hash_con'. Close and save the file.
4. Restart the ESET Remote Administrator Server service.
5. You will now be able to open ERAC without entering a password (When prompted for a password, leave it blank and click OK).
Windows 7/Vista/2008/2008 R2:
1. Click Start Run and type:
C:\Program Data\ESET\ESET Remote Administrator\Server\configuration
2. Click OK. Right-click the era_private.xml file and choose Open With Wordpad.
3. Remove the entire tag containing 'ps_password_hash_con'. Close and save the file.
4. Restart the ESET Remote Administrator Server service.
5. You will now be able to open ERAC without entering a password (When prompted for a password, leave it blank and click OK).
NOTE: If you wish to set a new password for ERAC, click Tools Server Options, and click the Security tab. Click the Change... button to the right of Password for Console.
Sumber : http://kb.eset.com/esetkb